Four eaters hassling four bookends

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Four eaters hassling four bookends
x = 29, y = 29, rule = B3/S23 10bo18b$10b3o16b$13bo15b$12b2o15b$29b$29b$29b$29b$14b2o13b$14bob2o11b$ 2o12b4o11b$bo13b2ob2o9b$bobo13b3o9b$2b2o13b2obo8b$8b3o7b3o8b$8bob2o13b 2o2b$9b3o13bobob$9b2ob2o13bob$11b4o12b2o$11b2obo14b$13b2o14b$29b$29b$29b$ 29b$15b2o12b$15bo13b$16b3o10b$18bo10b! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ THUMBSIZE 3 GPS 9 ZOOM 16 HEIGHT 600 WIDTH 600 LOOP 18 ]]
Pattern type Oscillator
Number of cells 56
Bounding box 29 × 29
Period 18
Mod 18
Heat 46.7
Volatility 0.90
Strict volatility 0.90
Discovered by Jason Summers
Gabriel Nivasch
Year of discovery 2002

Four eaters hassling four bookends is a period-18 oscillator that was discovered by Jason Summers and Gabriel Nivasch on October 16, 2002.

A 45-glider synthesis of this oscillator was found by Mark Niemiec the month of its discovery.[1] On July 27, 2023, KtT found a 40-glider synthesis,[2][3] followed by Chris857 finding a 35-glider synthesis and a 34-glider synthesis on July 30, 2023.[4][5][6]

This oscillator first appeared semi-naturally on March 13, 2017, in a symmetric soup submitted to Catagolue by benetnasch85.[7]

References

  1. Jason Summers' jslife pattern collection. Retrieved on January 5, 2020.
  2. shinjuku (#4752101198) (July 27, 2023). Job triggered by Adam P. Goucher at GitLab Catagolue project.
  3. KtT (July 27, 2023). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
  4. shinjuku (#4752101198) (July 30, 2023). Job triggered by Adam P. Goucher at GitLab Catagolue project.
  5. shinjuku (#4766520161) (July 30, 2023). Job triggered by Adam P. Goucher at GitLab Catagolue project.
  6. Chris857 (July 30, 2023). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
  7. Apple Bottom (March 28, 2017). Re: Soup search results (discussion thread) at the ConwayLife.com forums

External links